Alert archive / North Carolina / Union County
Weather alerts in Union County, North Carolina, 2009
128 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Union County and its neighbors
Each county as a circle sized by its count in 2009. Tap one for its archive.
- Alerts
- 128
- Warnings
- 29
- Watches
- 17
- Advisories
- 52
- Busiest month
- June27 alerts
- Busiest day
- June 11, 20096 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
0 of 1 tornado warnings covering Union County in 2009 had a tornado report inside them.
Union County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 17 | 11 | 35% | 10 | 80% | 25 min |
| Flash flood warnings | 3 | 3 | 0% | 4 | 75% | 70 min |
Each office's whole area, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Greenville-Spartanburg, SC: tornado warnings | 33 | 8 | 76% | 15 | 93% | 21 min |
| NWS Greenville-Spartanburg, SC: severe thunderstorm warnings | 394 | 237 | 40% | 457 | 86% | 26 min |
| NWS Greenville-Spartanburg, SC: flash flood warnings | 55 | 40 | 27% | 103 | 73% | 94 min |
An office's figures cover every county it serves, including across state lines.
Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.
The alerts
Every alert, in the order issued. Times are local, Eastern Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 2, 8:01 AM EST | Winter Weather Advisory | GSP | 3 hr |
| Jan 2, 8:53 PM EST | Dense Fog Advisory | GSP | 15 hr |
| Jan 4, 8:48 PM EST | Dense Fog Advisory | GSP | 12 hr |
| Jan 7, 4:29 AM EST | Mesoscale Discussion | SPC | 91 min |
| Jan 7, 5:14 AM EST | Wind Advisory | GSP | 19 hr |
| Jan 8, 4:33 AM EST | Lake Wind Advisory | GSP | 22 hr |
| Jan 18, 2:56 PM EST | Winter Storm Warning | GSP | 60 hr |
| Jan 19, 4:52 AM EST | Winter Storm Watch | GSP | 10 hr |
| Jan 20, 2:16 PM EST | Winter Weather Advisory | GSP | 19 hr |
| Jan 28, 3:57 AM EST | Lake Wind Advisory | GSP | 14 hr |
| Jan 28, 8:00 AM EST | Dense Fog Advisory | GSP | 3 hr |
| Feb 3, 3:31 AM EST | Winter Weather Advisory | GSP | 35 hr |
| Feb 11, 3:22 AM EST | Lake Wind Advisory | GSP | 7 hr |
| Feb 11, 3:22 AM EST | Wind Advisory | GSP | 19 hr |
| Feb 11, 12:17 PM EST | Fire Weather Watch | GSP | 18 hr |
| Feb 11, 8:33 PM EST | Severe Thunderstorm Warning | GSP | 57 min |
| Feb 11, 10:21 PM EST | Lake Wind Advisory | GSP | 2 hr |
| Feb 12, 6:00 AM EST | Red Flag Warning | GSP | 15 hr |
| Feb 18, 3:10 PM EST | Lake Wind Advisory | GSP | 26 hr |
| Feb 18, 10:04 PM EST | Severe Thunderstorm Warning | GSP | 26 min |
| Feb 19, 4:34 AM EST | Dense Fog Advisory | GSP | 2 hr |
| Feb 28, 4:12 AM EST | Winter Storm Watch | GSP | 25 hr |
| Mar 1, 5:18 AM EST | Winter Storm Warning | GSP | 23 hr |
| Mar 1, 3:19 PM EST | Areal Flood Warning | GSP | 3 hr |
| Mar 1, 6:16 PM EST | Areal Flood Warning | GSP | 3 hr |
| Mar 2, 2:45 PM EST | Winter Weather Advisory | GSP | 18 hr |
| Mar 16, 3:16 PM EDT | Dense Fog Advisory | GSP | 18 hr |
| Mar 18, 5:13 AM EDT | Dense Fog Advisory | GSP | 6 hr |
| Mar 20, 3:17 AM EDT | Frost Advisory | GSP | 26 hr |
| Mar 21, 3:36 AM EDT | Frost Advisory | GSP | 29 hr |
| Mar 26, 3:40 AM EDT | Dense Fog Advisory | GSP | 11 hr |
| Mar 27, 4:41 AM EDT | Dense Fog Advisory | GSP | 6 hr |
| Mar 28, 10:45 PM EDT | Areal Flood Advisory | GSP | 2 hr |
| Mar 29, 4:55 AM EDT | Wind Advisory | GSP | 17 hr |
| Mar 29, 8:07 PM EDT | Lake Wind Advisory | GSP | 2 hr |
| Apr 2, 3:06 PM EDT | Lake Wind Advisory | GSP | 27 hr |
| Apr 2, 3:06 PM EDT | Wind Advisory | GSP | 27 hr |
| Apr 3, 4:47 AM EDT | Mesoscale Discussion | SPC | 88 min |
| Apr 6, 3:37 AM EDT | Mesoscale Discussion | SPC | 83 min |
| Apr 6, 4:17 AM EDT | Freeze Watch | GSP | 23 hr |
| Apr 6, 4:17 AM EDT | Lake Wind Advisory | GSP | 16 hr |
| Apr 7, 3:31 AM EDT | Freeze Warning | GSP | 29 hr |
| Apr 8, 3:18 AM EDT | Lake Wind Advisory | GSP | 15 hr |
| Apr 10, 8:54 PM EDT | Mesoscale Discussion | SPC | 66 min |
| Apr 10, 10:06 PM EDT | Severe Thunderstorm Warning | GSP | 24 min |
| Apr 16, 4:03 AM EDT | Frost Advisory | GSP | 28 hr |
| Apr 21, 3:41 AM EDT | Lake Wind Advisory | GSP | 16 hr |
| Apr 22, 10:01 AM EDT | Lake Wind Advisory | GSP | 8 hr |
| May 2, 5:59 PM EDT | Severe Thunderstorm Warning | GSP | 61 min |
| May 5, 5:32 PM EDT | Flash Flood Warning | GSP | 88 min |
| May 5, 5:45 PM EDT | Tornado Watch | SPC | 5 hr |
| May 5, 5:50 PM EDT | Tornado Warning | GSP | 40 min |
| May 5, 7:10 PM EDT | Mesoscale Discussion | SPC | 65 min |
| May 5, 8:43 PM EDT | Mesoscale Discussion | SPC | 62 min |
| May 6, 11:40 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 6, 2:16 PM EDT | Tornado Watch | SPC | 6 hr |
| May 6, 7:29 PM EDT | Mesoscale Discussion | SPC | 91 min |
| May 7, 5:17 AM EDT | Mesoscale Discussion | SPC | 118 min |
| May 7, 3:03 PM EDT | Mesoscale Discussion | SPC | 117 min |
| May 9, 12:47 PM EDT | Mesoscale Discussion | SPC | 118 min |
| May 9, 1:17 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 28, 3:49 PM EDT | Mesoscale Discussion | SPC | 56 min |
| May 28, 6:01 PM EDT | Severe Thunderstorm Warning | GSP | 74 min |
| May 28, 7:12 PM EDT | Areal Flood Advisory | GSP | 63 min |
| May 31, 2:48 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Jun 4, 4:25 AM EDT | Flash Flood Watch | GSP | 32 hr |
| Jun 9, 2:31 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Jun 10, 7:22 PM EDT | Severe Thunderstorm Warning | GSP | 53 min |
| Jun 10, 7:47 PM EDT | Areal Flood Advisory | GSP | 58 min |
| Jun 10, 7:55 PM EDT | Severe Thunderstorm Warning | GSP | 38 min |
| Jun 10, 8:23 PM EDT | Severe Thunderstorm Warning | GSP | 29 min |
| Jun 10, 8:31 PM EDT | Flash Flood Warning | GSP | 3 hr |
| Jun 11, 3:29 PM EDT | Mesoscale Discussion | SPC | 61 min |
| Jun 11, 3:47 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 11, 5:53 PM EDT | Severe Thunderstorm Warning | GSP | 82 min |
| Jun 11, 5:58 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Jun 12, 2:08 PM EDT | Mesoscale Discussion | SPC | 67 min |
| Jun 12, 4:45 PM EDT | Severe Thunderstorm Warning | GSP | 44 min |
| Jun 12, 4:59 PM EDT | Severe Thunderstorm Warning | GSP | 61 min |
| Jun 15, 1:26 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Jun 16, 5:57 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 16, 6:37 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Jun 16, 9:41 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Jun 17, 3:17 PM EDT | Mesoscale Discussion | SPC | 28 min |
| Jun 17, 3:31 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 18, 3:13 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 18, 4:25 PM EDT | Mesoscale Discussion | SPC | 65 min |
| Jun 18, 5:29 PM EDT | Severe Thunderstorm Warning | GSP | 63 min |
| Jun 27, 2:06 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Jun 27, 3:16 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 27, 4:43 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Jun 27, 7:27 PM EDT | Mesoscale Discussion | SPC | 63 min |
| Jul 6, 6:08 PM EDT | Mesoscale Discussion | SPC | 67 min |
| Jul 17, 4:28 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Jul 20, 6:20 PM EDT | Mesoscale Discussion | SPC | 85 min |
| Jul 20, 6:44 PM EDT | Severe Thunderstorm Warning | GSP | 23 min |
| Jul 20, 11:19 PM EDT | Areal Flood Advisory | GSP | 56 min |
| Jul 20, 11:44 PM EDT | Flash Flood Warning | GSP | 3 hr |
| Jul 23, 6:49 PM EDT | Severe Thunderstorm Warning | GSP | 27 min |
| Jul 27, 7:09 PM EDT | Severe Thunderstorm Warning | GSP | 53 min |
| Jul 27, 11:34 PM EDT | Areal Flood Advisory | GSP | 116 min |
| Jul 28, 8:29 PM EDT | Severe Thunderstorm Warning | GSP | 76 min |
| Aug 5, 6:47 PM EDT | Severe Thunderstorm Warning | GSP | 73 min |
| Aug 22, 6:03 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Aug 27, 1:35 PM EDT | Areal Flood Advisory | GSP | 70 min |
| Sep 28, 4:44 PM EDT | Mesoscale Discussion | SPC | 61 min |
| Oct 18, 4:14 AM EDT | Frost Advisory | GSP | 29 hr |
| Oct 19, 3:17 AM EDT | Frost Advisory | GSP | 30 hr |
| Nov 6, 3:22 AM EST | Frost Advisory | GSP | 30 hr |
| Nov 6, 2:38 PM EST | Freeze Warning | GSP | 18 hr |
| Nov 7, 3:09 PM EST | Frost Advisory | GSP | 17 hr |
| Nov 9, 2:26 AM EST | Flash Flood Watch | GSP | 3 days |
| Nov 10, 3:39 PM EST | Areal Flood Advisory | GSP | 8 hr |
| Nov 11, 3:27 AM EST | Wind Advisory | GSP | 51 hr |
| Nov 11, 3:52 AM EST | Areal Flood Advisory | GSP | 6 hr |
| Nov 19, 4:53 AM EST | Dense Fog Advisory | GSP | 5 hr |
| Nov 19, 9:09 PM EST | Dense Fog Advisory | GSP | 9 hr |
| Nov 26, 12:41 AM EST | Dense Fog Advisory | GSP | 9 hr |
| Dec 1, 2:54 PM EST | Flash Flood Watch | GSP | 31 hr |
| Dec 8, 2:31 PM EST | High Wind Watch | GSP | 14 hr |
| Dec 8, 2:31 PM EST | High Wind Warning | GSP | 28 hr |
| Dec 13, 7:18 PM EST | Dense Fog Advisory | GSP | 17 hr |
| Dec 15, 8:06 AM EST | Dense Fog Advisory | GSP | 4 hr |
| Dec 18, 3:50 AM EST | Lake Wind Advisory | GSP | 20 hr |
| Dec 24, 2:44 PM EST | Lake Wind Advisory | GSP | 21 hr |
| Dec 25, 10:08 AM EST | Flash Flood Watch | GSP | 6 hr |
| Dec 25, 10:43 AM EST | Areal Flood Advisory | GSP | 4 hr |
| Dec 25, 9:43 PM EST | Dense Fog Advisory | GSP | 9 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 17 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 6 |
| Tornado Watch | 2 |
| Mesoscale Discussion | 30 |
| Flooding | |
| Areal Flood Warning | 2 |
| Flash Flood Warning | 3 |
| Flash Flood Watch | 4 |
| Areal Flood Advisory | 9 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 4 |
| Cold | |
| Freeze Warning | 2 |
| Freeze Watch | 1 |
| Frost Advisory | 7 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Lake Wind Advisory | 13 |
| Wind Advisory | 5 |
| Fire | |
| Red Flag Warning | 1 |
| Fire Weather Watch | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 14 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20082010
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.